diff --git a/js/packages/cli/src/fair-launch-cli.ts b/js/packages/cli/src/fair-launch-cli.ts
index 881b6fe..7ce263a 100755
--- a/js/packages/cli/src/fair-launch-cli.ts
+++ b/js/packages/cli/src/fair-launch-cli.ts
@@ -2388,7 +2388,7 @@ program
 
       console.log('Doing lottery for', numWinnersRemaining);
       while (numWinnersRemaining > 0) {
-        const rand = Math.round(Math.random() * (chosen.length - 1));
+        const rand = Math.floor(Math.random() * (chosen.length));
         if (chosen[rand].chosen != true && chosen[rand].eligible) {
           chosen[rand].chosen = true;
           numWinnersRemaining--;